Cutter-bar tool



Dec. 1924- 1,519,949

7 w. A. BORN 2 Sheets-Sheet 1 Dec. 16, 1924 1,519,949

W. A. BURN CUTTER BAR TOOL Filed March 27, 1922 2 Sheets-Sheet 2 INVENTOR ATTORNEY WITNESS:

Patented Dec. 16, 1924.

UNHTED STATES WILLIAM A. BORN, OF CHICAGO, ILLINOIS.

CUTTER-BAR TOOL.

Application filed March 2'7, 1922. Serial No. 547,058.

To all whom it may concern Be it known that I, WVILLIAM A. BORN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in CutterBar Tools, of which the following is a specification.

My present invention has reference to a cutter bar holder designed for use on shapers and planers of cutting and slotting machines, and has for its object to produce a device of this character which can be quickly adjusted for effectively securing thereon cutter bars of different cross sec tional diameters.

The foregoing and other objects which will appear as the nature of the invention is better understood, may be accomplished by a construction, combination and operative association of parts, such as is disclosed by the drawings which accompany and which form part of this specification.

In the drawings Figure 1 is a perspective view of the improvement.

Figure 2 is an approximately central vertical longitudinal sectional view therethrough.

Figure 3 is a view of the stock.

Figure 4 is a view of one of the sleeve members.

Figure 5 is a view of the cooperating sleeve member.

Figure 6 is av View illustrating the manner in which the device can be arranged on the machine to more conveniently position the holder with respect to the operator.

Figures 7 and 8 illustrate details.

The stock includes a flat bar 1 which is designed to be effectively secured in the ma chine. The bar 1 has at its outer end an offset rounded extension which provides what I will term a head 2. The rounded head has its outer face flat and is centrally formed with a cross sectionally round extension in the nature of a spindle 3. The spindle has its outer end reduced and threaded, as at 4c. The spindle has a transverse elongated slot 5 therethrough.

The head 2 is provided with an outstanding pin 6 designed to be received in one of three equi-distantly spaced sockets 7 on one of the flat faces of the sleeve section 8. The sleeve section is slidably arranged on the spindle, and the outer face thereof in a line with the sockets is provided with transverse grooves. Between two of these grooves there is an outstanding pin 9.

The second sleeve section is indicated by the numeral 10 and is designed to be received on the spindle l to rest on the sleeve section 8. The sleeve section 10 has its inner face provided with radially disposed grooves aligning with the grooves in the outer face of the sleeve section 8.

The radially disposed grooves in the sleeve are each of a difierent diameter, and one of these grooves at all times aligns with the grooves in the slot in the spindle, when the sleeve section 8 has one of its sockets 7 engaged by the pin 6. To hold the grooves 11, 12 and 18 of the sleeve sections in proper alignment, the sleeve section 10 has its inner face provided with a socket 1 1 that receives therein the pin 9 on the sleeve section 8.

Screwed on the threaded extension 4 of the spindle, there is a nut 15 which contacts with the sleeve section 10 to force the same longitudinally on the spindle and into tight engagement with the inner sleeve section 8 or rather with the cutter bar which is received in one of the grooves 11, 12 or 13 and through the slot 5 in the spindle.

With a device as above described, it will be readily seen that spindles of at least three distinct cross sectional diameters may be effectively gripped and held on the improvement. The sleeve sections may be readily adjusted to arrange the grooves therethrough in alignment with the slot in the spindle for the reception of other outter bars, and it is thought that the foregoing description, when taken in connection with the drawings will fully set forth the construction, operation and advantages of the improvement to those skilled in the art to which such inventions relate.

In practice, it is often found that with a straight shank bar holder it is impossible to arrange the cutting end of the bar as close to the operator as the work requires. Frequently this is the fault of the tool post because the same projects ahead of the bar holder and in order that a full length slot may be cut in the work, the cutter bar is moved forward enough to overcome the difference between the screw of the tool post and the bar holder. This causes the cutter bar to spring and unless great care is exer- IOU cis-ed it will dig into the work. This is especially true when key seats are cut in pulleys or like works which are provided with projections that extend out from the parts to be slotted. By employment of a device as illustrated in Figure 6 and the remaining figures of the drawings, this obj ection is successfully overcome. The head 2 of the bar 1 is offset therefrom providing a straight shoulder 22 therebetween. The bar 1, at a suitable distance away from the shoulder has a threaded opening 16 there-- through. In this opening there is screwed one end of a stud bolt 17. The stud bolt passes through the bore of a bushing. The bore 18 of the bushing 19 is arranged off of the center thereof, and the outer face of the bushing 19 is provided with notches 20. On the outer threaded end of the stud bolt 17 there is screwed a flanged nut 21, the flange of the nut contacting with the outer notched face of the bushing. A suitable wrench (not shown) is employed for turning the nut and for engaging the notches to the bushing to move the eccentrically mounted bushing on the stud bolt 17 so that the bushing and shoulder 22 of the head 2 may engage therebetween the head of the machine. As the bushing 19 is eccentrically mounted on the stud 18, it will be apparent that the turning of the said bushing will regulate the space between the bushing and the shoulder 22 and in this space there is received the portion or head of the machine on which the device is to be clamped. By further turning the bushing, a tight frictional engagement will be exerted between the said bushing, the machine head and the shoulder, and by screwing the nut 21 tight to the bolt 17 the bushing will be held from further turning.

Having described the invention, I-claim 1. In a device for the purpose set forth, a stock having a head provided with an extending slotted spindle and having a pin adjacent said spindle, a sectional sleeve arranged on the spindle, one of the sleeve sections having spaced slots to receive the pin therein, the sleeve sections having their confronting faces formed with radial grooves of different diameters and one of said grooves aligning with the slot in the spindle, and adjustable means on the spindle eng'ageable with one of the sleeve sections for moving the same toward or permit-ting its movement away from the vother sleeve section adjusting the same with respect to the inner sleeve section.

2. In a device for the purpose set forth, a stock including a head having a slotted spindle provided with a threaded extension and having a pin on said head, a sectional sleeve received on the spindle, the lower section of the sleeve having equi-distantly spaced sockets, one of which receives the pin of the head, said sleeve at the confronting faces of the sections thereof having radial grooves of different diameters, and one of which is in alignment with the slot in the spindle, coengaging means between the sleeve sections for sustaining the grooved portions thereof in alignment, and a nut screwed on the threaded end of the spindle and contacting with the outer sleeve section for adjusting the same with respect to the inner sleeve section, and an eccentrically mounted bushing on the stock disposed opposite the shoulder between the stock and head, and adjustable means contacting the bushing for holding the same at desired positions with so respect to the said shoulder.

In testimony whereof I aflix my signature.

WILLIAM A. BORN. 

